noun

• (weaponry) A firearm fired from the shoulder; improved range and accuracy is provided by a long, rifled barrel.
  "Still, a dozen men with rifles, and cartridges to match, stayed behind when they filed through a white aldea lying silent amid the cane, and the Sin Verguenza swung into slightly quicker stride."
• (military, usually in the plural, dated) A rifleman.
• (weaponry) An artillery piece with a rifled barrel.

verb

• (intransitive) To quickly search through many items (such as papers, the contents of a drawer, a pile of clothing). (See also riffle)
  "She made a mess when she rifled through the stack of papers, looking for the title document."
• (intransitive) To commit robbery or theft.
  "Thither repair at accustomed times their harlots […] not with empty hands, for they be as skilful in picking, rifling, and filching as the upright men."
• (transitive) To search with intent to steal; to ransack, pillage or plunder.
  "thine enemies […]shall ransack and rifle all the things of Edom; and shall search out all thy hidden commodities, and carry them away at once"
• (transitive) To strip of goods; to rob; to pillage.
  "Stand, sir, and throw us that you have about ye: / If not, we'll make you sit and rifle you."